Cutter for knitting-machines



H. PAULMAN.

CUTTER FOR KNITTING MACHINES.

APPLICATION FILED NOV. 12, I919.

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H. PAULMAN. CUTTER FOR KNITTING MACHINES. APPLICATION FILED NOV. 12. m9.

Patented May 31, 2 SHEETS*SHEET Z 3 T. Q T Q U 2 7 9 7 w 6 w 1 o 1N VENTOR. MM

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CUTTER FOR KNITTING-NLACf-IINES.

Application filed November 12, 1919.

To all whom it may concern:

Be it known that I, HENRY PAULMAN, a citizen of the United States, residing in Glastonbury, in the county of Hartford and State of Connecticut, have invented a new and Improved Cutter for Knitting-Ma chines, of which the following is a specification. 1

My invention relates to the class of cutters employed to out a knitted fabric as it passes from the knitting devices of a knitting machine, and an object of my invention, among others, is to provide a cutter that shall be extremely simple in its construction,

effectual in its operation, and one that shall not present an element of danger to machine operators or others.

One form of cutter embodying my invention and in the construction and use of which the objects herein set out, as well as others, may be attained, is illustrated in the accompanying drawings, in which Figure 1 is a view in side elevation of a depending portion of the upper part of the frame of a knitting machine showing my improved cutter attached thereto.

Fig. 2 is a view, scale reduced, of the lower portion of the apparatus illustrated in-Fig. 1.

My invention is not limited to use in connection with a knitting machine of any spe cial type, but as I have found it to produce extremely satisfactory results in connection with circular knitting machines I have selected such a machine for the purpose of illustrating my invention in the drawings herein, only so much, however, of said circular knitting machine as is necessary to an understanding of my invention being shown in such drawings, in which the numeral 5 indicates the roll supports of a circular 1 knitting machine which supports depend slots (not shown) in the supports-5, this roll resting upon a feed roll 7 mounted in bearings on the supports 5 said feed roll having a step-by-step rotatlon caused by a pawl 8 on a rocking arm 9 secured to the Specification of Letters Patent.

Patented May 31, 11%?)1.

Serial No. 337,5?0. 7

roll, said pawl engaging ratchet teeth 10 rigidly connected with the roll. Rocking movement is imparted to the arm 9 as by means of a rod 11 having a reciprocating movement caused by mechanism mounted on the upper part of the frame in a manner that will be readily understood, which mechanism is, therefore, not shown herein.

The fabric, illustrated by the dotted line 12, passes from the knitting devices (not shown) in the form of a tube to av flatten ing rod 13 extending from one support 5 to the other, the flattened knitted fabric passing from said rod around a tension roll 14, between said tension roll and the feed roll 7 and between said feed roll and the takeup roll 6 and thence around the latter on which it is wound.

Supporting rods 15 extend from the front and rear edges of the broadened lower portions of the supports 5 from one support to the other, and as all of the parts herein above described are of old and well known construction in connection with circular 'knitting machines in common use, further and detailed description is omitted herein.

In carrying my invention into effect I arrange a pair or pairs of shears, each embodying at least one member having a rocking or reciprocating movement, said pair or pairs of shears being so located that the knitted fabric is passed into the throat between the shear blades as the fabric is wound upon the take-up or receiving roll. In that embodiment of my invention herein shown I have arranged two sets or pairs of shears, one set being located to engage the opposite side of the knitted tube from that engaged by the other set, and a description of one of said sets will be deemed suflieient for the purpose of disclosing the invention herein it being understood that such description will apply equally to both sets of shears, as all are constructed in the same manner.

My invention comprises a mechanism that can be readily attached to knitting machines 10W in common use, said mechanism embodying supporting blocks 16 secured to a supporting rod 15 at or near each end, as herein shown said blocks each comprising two members secured in place by a clamp screw 17. The outer ends of the blocks have bearings for a rock shaft 18 that is operated in a manner that will be hereinafter described.

from a blade operating collar 22 secured to the shaft 18, a spring 23 being employed to exert pressure upon each blade support 20 and thereby press the blades 19 into contact with stationary shear blades 2 1 secured to and projecting from blade supporting plates 25 rigidly secured to the stationary blade supporting blocks 26 firmly secured to the supporting rod 15.

One of the rock shafts 18, that at the front side of the machine, as hereinbefore described, has a shaft rocking arm 27 that receives a reciprocating shaft operating rod 28 that is connected to a shaft (not shown) at or near the top of the frame-and from which reciprocating movement is imparted to the rod 28 in a manner similar to that for imparting reciprocating movement the rod 11. Shaft rocking arms 29 project from each of the shafts 18 and are operatively connected by a connecting rod 30- that rocking movement of one shaft is imed thereby, a blade actuating shaft supported by said red, one setcomprising a plurality of cutting blades being rigidly secured to said shaft,.an'd. means for actuating said shaft.

2. In combination with the frame of a fabric forming machine having a take-up roll supported thereon-and a stay rod extending across the machine between the side parts thereof, a cutting device attached to said rod between the side parts ofthe frame and including a stationary blade supported by said rod, a rock shaft mounted in a plus rality of bearings supported'by said rod, a blade rigidly secured to said rock shaft to 'be recipro'cated thereby for cutting action,

and means for actuating said shaft.

3. A- cutting device for a fabric making machine including a supporting rod extending across the machine and secured to the "side parts thereof, a bearing block, means ifor securing said block to said rod, a rock .shaft mounted ID'SCtlCl block, means for operating said shaft, a. cutting blade supportedby said shaft to be operated thereby, a

blade supporting block, means for securing parted to the other and the two-shafts aresaid blade supporting block to the frame of tained from them and they may be readily removed or replaced when desired.

ably attach the support to the rod 15.

It will be understood that the upper portion of the frame hereinbefore mentioned and including the side parts, crossbar and roll supports 5 constitute a rotating head that rotates with the fabric as it is knitted on the machine in a manner that will be understood as common to circular knitting machines.

In accordance with the provisions of the patent statutes, I have described the principles of operation of my invention, together with the device which I now consider to represent the best embodiment thereof; but I desire to have it understood that the device shown is only illustrative, and that the invention may be carried out by other means.

I claim- 1. In combination with the frame of a said machine, and a cutting blade supported a by said olade supporting" block. pairs of shears desired may be attached --:j either of the supporting rods 15, and the shear blades of each pair of shears are supported that most efficient action is obside parts thereof, a bearing block rigidly secured to said'rod, a rock shaft rotatably mounted in said block, means for operating In order to firmly support the rock shafts 18 I have shown in the drawings herein shaft Supports 31 located between the blocks ably secured to said rod, and a cuttingiblade 16, a cap 82' removably secured to the main part of each support being used to remov- 4. A cutting device for a fabric making machine including a supporting rod extending across the machine and secured to the said shaft, a cutting blade rigidly'secured to ssaid shaft, a blade supporting block'removrigidly supported by said blade supporting block. g

l 5; A cutting device for a fabric making machine, said cutting device including a rock shaft supported by the frame of said machine, a cutting blade supported by said frame, a blade support loosely mounted on said shaft, a cutting blade secured to said support, means for connecting said support to said shaft, andmeans for operating said shaft. 7

6. A cutting device for a fabric making machine, said cutting device including a rock shaft supported by the frame'of said machine, a cutting bladesupported bysaid frame, a blade support loosely mounted on the shaft, a cutting blade secured to said support, a blade operating finger rigidly connected with said'shaft and loosely engaging said blade support, means for pressing said blade support toward the first mentioned cutting blade, and means for operating the'rock shaft. I r

7 A cutting device for a fabric making machine, said cutting device 'including a rock shaft supported by the frame of said machine, a stationary cutting blade support- 'ed by said frame, a blade support loosely mounted on said support, a cutting blade secured to said support, a collar secured to said shaft, a finger projecting from said collar and loosely engaging said support, and a spring located between the collar and support to eXert pressure upon the latter.

.8. in combination with a supporting rod of the frame of a fabric making machine and a take-up roll supported by said frame, a bearing block removably secured to said rod, a blade supporting block removably secured to said rod, a cutting blade rigidly supported by said blade supporting block, a rock shaft rotatably mounted in said bearing block, an arm extending from said lOCn shaft, an operating rod to reciprocate said arm, and a cutting blade secured to said shaft to be operated thereby.

9. In combination with the frame of a fabric making machine including side parts, a take-up roll to receive a tubular fabric made on said machine, pairs of shears located opposite one another and supported by said frame to operate upon opposite sides of said tubular fabric, each of said pairs of shears including two blades to receive the fabric passing to said take-up roll, a plurality of shafts oppositely arranged to operate in connection with opposite sides of said fabric and supported by said frame, each of said shafts supporting a cutting blade, and means for o ieraiting said shafts.

10. In combination with the frame of a fabric making machine including side parts,

a take-up roll to receive a tubular fabric made on said machine, parts of shears located apposite one another to operate upon opposite sides of said fabric and supported by said frame to out said tubular fabric on opposite sides thereof, each of said pairs of shears including two blades, a plurality of shafts oppositely arranged and supported by said frame, each of said shafts supporting a cutting blade, an operative connection between said shafts, and means for operating one of said shafts.

11. In combination with the frame of a machine for making a tubular fabric and including side members, a pair of shears supported by said members in line with and on opposite sides of said fabric, said pairs of shears each including a blade rigidly fixed against movement, and a blade movably supported, rock shafts extending beshear blades.

HENRY PAULMAN. 

